<template>
  <div class="header">
    <div class="top">{{ header_title }}</div>
    <input type="text" name="" id="">
    <div class="nav">nav</div>
  </div>
</template>

<script>
  export default {
    props: {
      header_title: {
        type: String,
        default: "header 标题"
      }
    }
  }
</script>